Calculating-machine.



J. P. MAYS.

CALGULATING MACHINE.

APPLICATION FILED MAY 11, 1914.

Patented Feb. 2, 1915.

s SHEBTSSHBET 1 EEVLL- JamesFMa, Z /r f' witwassen J. P. MAYS.

GALCULATING MACHINE.

APPLICATION FILED MAY 11. 1914.

1,127,06 1 Patented Feb. 2, 1915.

3 SHEETS-SHEET 2.

James FMG/(ys,

J. F. MAYS.

CALCULATING MCHINB.

APPLIGATIONVFILED MAY 11, 1914.

Patented Feb. 2, 1915.

3 SHEETS-SHEET 3.

'v/Alll e TE A s i 1&2.

1&5..

lmuento'n Witnesses ,150i such machines .without sacrifie-ingy elhhodimenhereQf, and

` 25 carried on ybetween the registeiiiigilinfls on on line 5**5, Fig. 4, lookingfi letes eze minieme-Haie, inheemse essenen 'To' 'iiIAY-s'gcnif fibre jmecnnin cammini?, on .Asnngvmn roeien censuarie., s. comom'risrior f megane i 2 1,127,961. l evene-Eemofaeersrafem patentedRhei-1915.

Application'fled May il. wie. Sera Ho. 837,?74.

Zo-a2-whom t mag/ eoneefrm v keys in several riollumnsI simultneously.' Be 1t known that l, JAMES F. MAgs, n ,citiv Usually xnfichines which, edi in zen of the United States, residing .a Bir this manner employlmre less coinplex minghmn, in the count-j.' of. Jeierson and mechzinisifnr i 5 State of Aiabaina, 4here invented ceruin My invention'also contenlpleegfthe.Rise.- 50 new and useful. 'Improvements in Ceiculnb in' eonnecion with the-felice" nlien :oneii 111g-l\iach ines;5f.which the. foliowingis e dins, ofu'set of proving-Mis,which@ ef'ich specihcnmon. n .i i key stroke indicates the 'fighi/feige@ i yup, :This invention relates more. esnecially je *end which serve, as will, lii'einzififtonmore l@ improvements in that class of fculcuiatinif 3Vrea," j; appear, reife,v` nse in. 65

:no uhines whiehenxploy e, keyboard and `the eperition of this mahineiy; i i i semesof registering diziis, and the pi'iinry ln er io more fully r1be. rn;\f'3n enobject of the invention is tigrsiinplifj; the' con-M" icijrivill beheld i heniinjpiiny- ,i. $7 u f siructiolianfi lessen 'thecost o manufacture' vlngf 'Li-refe ngs which lshox onebsgenifi'c emvhield. l if. 'i l` ciencyf or accuracy, and 'this isgeectedf "iguel, represents sin' ,urchin mainly by he snnphhcationol liewrx'y'in plein; 2, an enlargegll leugen i, .which the,` operation of carrying vis Wrhone. all elevation, pertlyii;

' Generaily in machines of this class' 'there is carrying dial stepping mechan o 1an interconnectionbetween the successive v eriiczil'seetion on linexfqg; registering dials -on which the nunibe'rsare' parts remmcd; (Fig. 4,:i;--fri;rgm setup, bviv'ihich interconnections. number. yiljlontul section through ith fis crried from a dial of a lo\verto9ne`of a and keys, showing the .inf 4, me l. higher denomination, such operation being in top plan; Fig. 5, u frngmeney Y weet-ion 80 which' the finali resuh, is shown.. One miay. of "of the arrow; Fig. 6,11.frarfneneuysectional gemitting motion fxfonrone/siich' diei 'fo an elevation on line (x-jFi'g hfflpkingi in other is through thefs of actuated the direction of the arrow Righ?, effi-mgesapement mechanism. ,f'f i mentaryfsection on liney-fmFig,fdoolv j@ my imprfo'ved m2ol'1ine,the main zeging in thedirection of thenrrfowan. S5'

@lering dials do not ciu'ryvagfall, thecerryg 'enlarged detail sectionalelexation, aken `on ang beingA doneV on :n suppicmentaryset' of line 8"--8X`, Fig. 4.. lookingin*thdieeton dials which-display only the amou'nis 'ofthe arrow, and.; Fgf'h insigni-.enea .de-

ried.' V-The inalresult 'is then obtained, in `tail section on line QK-QXUEIgAUi .'i' i 35 the case of addition, for example, by merely The machine here "irshownf lcmmmisesf 90 adding' to the amounts displayed by lie main among othei parts, 'a vserie ofi columns-.0f dials, the amounts shownf'by `the ceri-ying keysl, upon theffinger.tipsof.Whihiapnenr dials, by striking keys in colulnns and of the digits corresponding tffthexsenemlkeys denominations corresponding to thenu'lnbers as usual in this classy of. nnnhin'eisgzsaidgigits 40 displayed on the carrying dials. By such an inl the machine here shwnarewdingnfromone 95 arrangement a great'fdeal of the more or less to n;iue. inclusive, in 'each cdlumn eonlgmenccomplex carrying mechanism hitherto eming with the loWermos-tkeyehreichgsoluhm ployed in machines of this class is entirely or the one nearest -the-opeiaitomnrf r' avoided. f l InA 'the accompanying dmimgs, hidfe 45 In my inlchine hesevei'alf sets 'ofj'clials 'shown `the machine asfprrvifecl Mithbglit 100 wronged-With respect to each other,A columns of keys, but'thisfnfgnh 'sammely :m'lfwithf respe'c'tA to thecohunns of keys, arbitrary, since any desirel nmhbexfrof thafthe prtion ofthe tn-gichine is purely eoluirnns may be emplojveclmf' stems? of mehaiicl' 'nd,mayfh'lpelg'fornled with the .keysextend through-z:slosill'i are i guided foi."- verical movemeirgbymplntes 222 105 whenever any key in a corresponding col-l position, the return movement or each key being limited by a stop pin 7 thereon engaging plate 2.

For each column of keys there is a master rock shaft 8, said shafts-being journaled for rotation in plates 4 and 5. Theseshafts are adapted to be rotated or rocked individually on their longitudinal axes a given amount umn is pushed down its full stroke, each ke in the column, however, rotating the sha t a different amount. For example, the full downward stroke of a 1 key will rotate its corresponding shaft 8 a given amount; the full downward travel of a 2 key will turn its shaft `8 twice as far as the 1 key, and so on with the keys of the respective columns to the 9 keys which rotate the shafts 8, nine times as far as "do the 1" keys. Such movement may be transmitted from the keys to the rock shafts in a variety .of ways.

may carry a series of rocker arms 9 fast thereon, and all setto occupy corresponding angular positions in the normal position of the shafts, while the key stems carry lugs 10 fast thereon and so disposed as to engage and rock the arms 9 on the downward travel of the keys. By having each key travel downward the saine amount for its full stroke, which may be effected by having the lower ends of all the keys Jhe saine distance from the bottom plate of 'e machine in their normal positions 1 d a-.f'apted to strike said plate at the lower limit of their travel, it becomes an easy matter'tc.. regulate the amount of throw imparted to the shafts 9 by the keys by the disposition of the lugs 10 which enga ge the rocker arms. For example, the lugQof the 9 key would occupy the positionl shown on the key on the right Fig. (i, the lug on the 8 key would be slightly higher up as shown on the key on the' left in said figure, and so on to the 1 key which would have to travel nearly its entire stroke before its lug 9 would engage its rocker arm. The rock shafts 8 are thus rotated by the keys, each against the tension of an individual coil spring 12 by which they are returned to normal and each stopped in the position of rest by a stop lug 13 fast thereon engaging a stop pin 13 on the 'frame of the machine. Foreach of the rock shafts 8 there is a dial shaft 14,

said dial shafts being journaled in two transverse plates 1.5 and 16 supported in anv desired way between the sides 17 and' 18 of the machine.

Each' dial shaft 14 carries fast thereon a number registering dial 19 having a series,

of numbers 0 to 9 equally spaced around its periphery. Rotation is imparted to these dials from thevrock shafts '8 by the following mechanism: Each rock 'shaft extends through plate-5 and carries on its For example, each rock shaft S' end a gear 20' fast thereto, and each of these gears meshesx with la pinion 21 fast `on a sleeve 22 rotatable each on one. of thedial shafts: Fast on or integratwith each of these sleeves is a disk 23 which carries an annular spring pawl.' 24 which engages 'with the teeth of a ratchet 25 fast on chdial shaft. The gears 2O and 21 are proporf tioned that for each full key stroke the dial 19 corresponding to the column in which the key struck is located, will rotate through an are sullicient to bring the number on that dial corresponding to the number on the key struck, into the display position which in the case shown is in the vertical plane of the axis of the dial shaft and labove the same;

where said, numbers may be seen through openings 26 in thel top plate 27. When the operated key is-release :`l,l its shaftS rotates backward under the action of spring 12 andA in so rotating causes the corresponding ratchet 24 to -travel back each time to its normal position. The dials 19, however; re-

main in their set positions untiL-one of their l corresponding keys is again struck, said dials being prevented from' rotating back ward by ratchets 28 fastvon shafts 14 and sof engaging with holding pawls29 pivoted on 'y cross-plate 16.

For each dial 19 except the one on the right umn of keys. there is a carrying dial'v 30.

These carrying dials are all mounted forrotatioii around the axis of a common vshaft 31 extending transversely acrossv the mii-1jv chine at right angles to thel axes of the dial The specific way of'mountingl shafts 14. these; carrying dials here shown mav be seen most clearly in Fig. 3. Each carrying dial f rotatable on a sleeve fast in the upper end of an individual upright or standard secured to the bottom of the machine. the

lor the one corresponding to the units .-col` shaft 31 passing through the axis of and rotat-able as well as longitudinally slidable with respect to each of said sleeves.

, Each sleeve 32 is provided with a flange` face of the t 34 which engages the inner web of the carrying vdials to prevent'lateral here shown, or from 1 to any other number if desired. with a zero or blank space, `asl may be desired. between the lowest and high- These iiizfnbrz's are adapted to est numbers.

be displayed through openings 36' inthe top plate 27 to indiate the amount carried.

Ver operating the carrying dials the fol. lowing mechanism is.v provided. is bei'oi'e stated, there is kfast to each of the'cairying dials e 'ratchet 35. F or each of these ratchets there is an actuating pawl 37, and each of these 'pawls is carried upon an individual .arm 38 mounted for angular movement each lupon vone ofthe sleeves 32. Esch of these armsis 'connected through a pin and slot l connection 39, 40 lwith anindividual'lever .arm 41,' and each of these lever arms isv fast to an individual sleeve 42 adapted to rock on a shaft 43 supported in the sides of the machine. `Also fast to each of the sleeves'42 is a lever larm 44 and each of these arms restsgat its free end upon a drop cam 45, f one lsuch cam being fast upon each of the dial shafts 14. The cams 45 are so adjusted that when the dials 19 stand at zero, arms 44 rest upon the lowermost` portion of said cams,'-and v when seid cams have rotated nine-tenthsfor1 s revolution, as they will do upon the operation of e 9 l? key, the arms 44 res-t upon the highest portion of the cams adjacent the drop so that on the next movement of the cam its arm` 44 Will pass the drop.. On account of the position of the dials with respect to'ztheir corresponding cams 45, the free ends of ell of the levers 44 except'` the one on the eit'eine right 4or lthe 'one engaging the units cam are bent at right angles and then down asl shown most clearly in Figs, 4 and 8.

The throw of Cams 45 and the teeth of the ratchets are so proportioned that .for one complete rotation oa dial shaft 14 or its dial 19, the ycorrespondingcarrying dial Will 35 rotate -on'eltenth'of a revolution. In other words, while the dials 19V Will rotate for- Ward-'an amount'corresponding to the number 'onthe key operatedin a column corresponding toa given one of such/dials, the depression ofthe same ykey imparts an angular movement to the dials30A only' one-tenth of that of` the corresponding dials 19. Hence each-key stroke imparts a separate moveyment to the two setsof dials at the same time, the movement of the lcarrying dials vheilig always one-tenth thatV of the main dials19, Iin the machine here shown. f

` For the purpose of causing thedials 30 to displztythrough theirfopenings 36 'only 5Q-Sthejfsnu1nbers carried, ,there .is provided vfor eecliysuch dial" a. shieldQgsi-G' extending parbtially around'the circumference of said dials, j gand movable with.A respectg'ytoisirid .dials ciri f cumferentially thereof'kbynrms'to which i551 the respective shields 'are ymade'ajstxunt formedon, eachsuch shield'beingfyprovide'd Withy an opening 47 todisplaysthe'fnumbe. married.V The arms 44' are held downggn cams A45A under the tension tof. slndividuahc'oil 'spring-$.48. Thevfunctionot?. the fshiveldsgxvillh lore fully appreciated-atten thetoperj ati'on of the machine has been described. 'fTlieoperation'V o fth'e parts thus far decs'cihdiis biieyasffolloujs: So` far jas the 65. opration of the dials 19 is concerned, thcjir -ope'rate independently of each other,

The carrying is done entirelyy by the dials 30 in the following Way: Each forward engular movement of a rock shaft 8 imparts a. forward angular movement to 'its spending cam 45. Y Cam 45 in rotsting; lifts the outer end of lever 44 ,restin thereon, and in so doing raises arm 38 en there# fore imparts angular movement tol-the ons?? ing dia] in line with the column of `keys the next higher denomination and-'a corra? sponding angular movement to its shield- 46,

tso, that if' the dial .started fromits zero ptr siti'on, it will .still display erothrough opening 41. IThis movement Aof the dial and shield will continue :is each key in` the column. with the first key operated is struck until the drop vot its cam 45 passes its lever which causes said lever to descend and pull arm 38 back one tooth of ratchet, Y said arm carrying with it its shield 46, 'the opening 47 of which now displays the number carried, since the shield drops back only when a number is to be carried, or, in other Words, when two keys in the same column are struck the sum of Whose digits` is ten or greater than ten, the cams 45 being so proportioned that their drops pass the lever 44 on the last one-tenth of the rotation of a corresponding dial shaft 14. 'The dials 30 also have Ano connection one ,with the' other as will be seen, each beingi operated from the keys in n column of the next lower 'ivob I denomination, that is, the carrying dial for or in line with the thousands column of keys is operated from' the keys of the hundreds column, the carrying diul in the hundreds column lis operated from the keys of the tens column, and so on.

.The shields 46 prevent the display through openings 36,'of any but the actual numbers carried. vIf i stationary display openings such, for example, as the openings 36 alone were employed, even assuming that theyfwere as narronymeasured in a direc-A tion at right angles to the axispf dials 30, as openings 47, such openings instead of dis-',125` playhig in all cases-the actual numbers car- Y ried, would display a. portion of said nurnl bers and a portion'of the next preceding, or

`succeeding numbers as the case may-be By having the numbers to be displayed folv IRCCS:

lovved by the opening l? of its shield, the hunner carried alone will be displayed since bcdy of the shield hides the other num- 1 rfhe outer display openings 3G are longer than the shield openings 47 to the travel of the latter without obstructed. It will be readily seen t the load on the keys is extremely small, hach u ll greatly lighten the linger stroke ry to operate the machine.

Let it be required to add #1793, 3546 and 2972. the operator st es the Ll key in say the fourth coiumn i eckoning from the right, the "i T i key in the next column on the right, the 9' key on the next column still on the right, and then the 3 key in the next co1- umn, proceeding preferably from left to right, as this is the lrgical though not necessary order. in a similar way he strikes keys in corresponding columns for the numbers 3.345 and 2972. rIhe dials 19 corresponding to the columns of keys operated will then display the numbers 9-1-0-1 respectively, as shov-:n in Fig. 1, which will .be the sum the three amounts added, less the amounts carried`r which latter amounts will be displayed by the carrying dials above the figures 9-`i-01 respectively, as shown in F ig. 1. Then by striking the keys corresponding to the numbers Z-Z-l in the columns of said keys in line with these numbers set upon the carrying dials, the yamount carried will be added on the main dials 19, when the latter will display the true sum or" 11311.

.l The main dials and `rpenings Q6, 36 are so arranged as to display their dial' numbers in line with each otiher and with their respective columns of keys so that one 'may readily see at a glance just which igures are to be added to give the final result. This relation is especially useful with respect to the numbers of the carrying dials. since they display the numbers fwhich areito be struck on the keys togive the final result, and it is a great aid to accurate operation to have the numbers in line with their respective key columns. This greatly lessons the liability of striking a key in the wrong column in getting thetinal result.'l It is also preferred that the key tops and display openings all he substantially in 'the same horizontal plane as here shown, though this is not essential.

Siiice the dials 1b are entirely independent in their operation` that is. the rotation of one doesnot etl'ect the rotation of the other, the same holding true as to the dials .38. the machine maybe operated by striking one key 4in several columns simultaneously, rendering the machine susceptible to duplex operation.

For the purpose of showing that any key struck has been properly perated,tlh\at 1s,

To stt up the tirst'numoer (4793),"

19 and the carrying dials' f is sen*U down a full stroke, a number corresponding to that on the top of the key operated will be displayed through one of the openings 50, corresponding to the column of keys in which the one operated is situated. If on theo-ther hand, the number is not fully displayed through said opening, it will show that the key has not been fully operated, Aor if the number displayed through a given opening 50 does not correspond say to the number shown by one of the carrying dials in adding that number to the one shown on its corresponding dial 19, this will show that the wrong key has'been. struck. wrWhen. the keys are released, however, the dials 49 return to zero, since they are fast to the pinions 21 which are positively geared to the key operated rock shafts 8. The openings 50 for these dials are also in line respectively with openings 26 and 3G and their respective key columns. These proving dials while useful are not an essential part of my machine, and may be dispensed with if desired. No extra mechanism is provided for resetting dials 19, since they may be reset merely by striking the keys in their corresponding columns.

The mechanism for resetting the carrying dials to zero or normal is extremely simple. This resetting mechanism comprises, among other parts, shaft 31 on which is made fast a series of arms 51. one for each of the carrying dials, and adapted to cof'iperate each with a pin 52 on its corresponding carrying dial (see Fig. 3). The shaft 31 may slide laterally and is normally pushed to the right under the tension of a coil spring 53 (Fic. 1l so that the arms 51 are out. of the paths of pins 52, and said shaft is normally under angular tension bv said spring so that stop pin 5-1 on said shaft engages a stop pin 55 on the machine frame or casing. To reset the carrying dials. shaft 31 is shifted .to the lett a sufiicient amount to bring the arms 51 into the paths ot' pins 52, then rotated until pin 54 is brought around into engagement with stop 55. when the dials willbe returned to their initial or zero positions by the engagement of arm 51 with pins 52 on the' dials. Shaft 31 is thus operated by a knob 56 on the'outside of the-machine, which when released allows the shaft to rotate backward to its normal position when pin 54 on the shaft will engage stop 55 and stop the rotation of the shaft. At the sametimel loo LE 5 the shaft 31 will be sent lateraiiy to the right nnder the action of spring thus disengag ing arms i from 'the pins on, the dials,

Por the pin-pose ot' preventing overthrow 3.. ealcnleting machine., comprising a series of coininns of keys, said eolnmns oorresponding to units, liens, hundreds etc. denominations, a registering dial' for each; of

5 of. dialsl? the following or anyother'desired Said eolnnins, and means for zmlnirting mechanism may be provided.: On each dial angular 'inoven'ient to said dials from the shaft 14 there is mounted a stop ratchet 17 :fast to shatt 14., for each :3f-these ratehets there le provided stop lere-7 or oai-Ji t keys .of their' resoeetive columns oniygla Carrying dial ior each of said key 'colnm'ns but the unite n, and ineens to impart.

Within the Scbpe of myinventin. f, i 6. A calculating machine1v comprising a What, Vclaim is; plurality of columns of keys, a roelrshaft 1. A calculating machine, comprisfivg a. f0r each of said columns, lmeans for yim 1art1 plrality of pairs of registering dials, a cL 'mgangular movement .toj Said l'rock /hafts se umn of -keys for each such pair of dials, and "lO- the keys 0f their' respective ACLlliImItS, meehanism to 'control the` rotation of said "the Seid 'movement Of SidvIOCk. Shaftsfiry" dials' from .said keys, onefofifs'ad. dials of mg according to the key in aolumn' Oper'- 'each paix-being Controlled by the ykeys 0f a ated, a number registering dial for eaf'ch of columnf the same-denomination therewith Said rock shafts and means forrotating'aid only', and theother dialof the same pair-be` dials from their corresponding rock Shafts ingcontr-.olled byvthe keys in a column of therxt linverdenominationonly, the latter dials registeringjonly the amounts. carried `@from a col'ixmn of lower to one of a higherdenomination. v v l 2. Aealcnlating machine,', comprising a plurality of pairs .of registering dials, a column .of keys foreachsuch pair of dials., and y mec ansm to control throtatin ,of said dials from said' keysffoneof saidgdials' of each pair being controlled vby the keyspfa eolumnof the sameI denomination tl'ierewith only, and the otherdial of the-'sgrne3 agir bei ing controlled bythe keys in a, eoluinn of the next lower denomination" only,' the latter dia-ls registering only the amounts carried from a collimn of lower to oneqef a higher denomination, the dials of each airfar- Yranged to register thx'nnmbersn .with thel'respectve 'columns oi' keys.

carrying number registering dials, means individual to each of said carrying dialsfand operated by saidroek shafts of nextflower 'denomination' for rotating lsaidoarrying dials independently of each other andat a different; angular velocity Ifrom said first named registering dials. 7. A lcalculating machine; comprising .a plurality of coluinnsof lreys'a roclfslhaft or each of said columnsy'ineans foroiinpartang angular movement @toi said iroelifislhafts roxnv the keys of theirrespective columns, the said movement of said rock shaftsyaryf ing according to' the key iniafcoluninzfgerl Said roclr'sllatts and means: for rotatinglrsaid dials Yfrom their corresponding rock "Shafts 'and'independentlyont each other, a seriesf'o'lf. @anyiligmlmber registering dials, aeam inated, a numbenlregisteringdial foneieh df" 10 E aoh of these stop ievers; is se im mi i@ angular nio" n' to said 'carrying dials dividnei :supplementm'y rooie, sii-itt one IGID Eil@ KEYS 0'. {OUHIH @i a neiitllffil fm'` each ofthe master roch' shafts, and eo;- denolnination, the id. carrying dials being tending, pmau www and journal@ in independently inoaiile withrespeet to each plates Land Each of these supplementary nth-SI- i l thereto, one for eaeh key in its correspond- Se@ 0f lllllb?? lf'ls'l' dl'lSa-a. Pllfllty v ing key Column 'These mms ,im Rdapd t() of Columns of keys and key oontrolledrne "ne be .struck and operated by pins (Si Vfast on the DIPM Simul-tl-HUUS flnulil" "m" respective .keys so 'dispgsgd hat when my to one dial in each of saidsets, brit at dnerx1 20 key ispushed down to its fullest extent7 its ent engnlar veloeities, for the PUI'IJQMNSM pin 6l will engage anar-n1 60 justine-fore the OIL y ,l s key refeches the end of its downward moV Cull'ii mlllzee :hiring ment, when the `oorrespondng' shaft 59 will 1 Hum-39T egl'l?! (HMS: lfiff Y 5l 'be rocked and send the nose et' its stop lever A v pendeln-ly rotatabie with respect mi, if;

25 58 into -position to engage tooth of, its 09h91', 2*# @011mm 0f kS'SKQIQiL-C Ofr,Simi ratei-iet 57 .and sto-p 'said ratchet ai: the indink, means Controlled by Said' keys to? 1im stant the litey -reaohes the end of its .stroke. yport angular movement to diff-115,55' The shafts 59 are returned each to its non lng flCCQlfllg t0 the k6?? kin CEi ,PQIiflmg mal position by a coil spring (52. N0 claim columns operated, and a seriesfof a,rrying is here made tothis overthrow mechanism, dllS @ach 0f WhCh iS -ndelendently 'roand any desired form may loe used, i tateble with respect to the. oth r and niean's While I have here Shown. and described Common to each of Said first]v named 4,dials but. one Spcifie embodiment if my' machine, l and a carrying dial of anext higher' yorder .it-should, be understood that the same is sus- 01 dBDOmHaOH fOl fttlg -Sldf @laid 3 5 ceptible to many changes'and .modiieations- "but at dffel'ellt angula'r "Q10-Cities and independently of each other, a series of Y dividual to each of said carrying dials and operated each by a rock shaft of a next lower denomination, a ratchet fastto each of said carrying dials, a pawl for each of said ratchets, means operated by each of .said cams to operate said pawls for imparting rotation to said carrying 'dials each independently of the other.

.8. A calculating machine, comprising a plurality of'columns of keys, a rock shaft for each of said columns, means for imparting angular, movement to said rock shafts from the keys of their respective columns, the Vsaid movement of said rock shafts varying according to`the key in a column operated, a number registering dial for each of said rock shafts and means for rotating said dials from their corresponding rock shafts and independently of each other, a series of carrying number registering dials, a cam individual to each of said carrying dials and operated eachby a lower" denomination, a ratchet fast t'oeach 0fsaid carrying dials, a pawl for each of said ratchets, means operated by each of said cams to operate said pawls for imparting rotation to said carrying dials each independently of the other, and a shield individuad to each of said carrying dials and movable by said cams to display one number at a time on said carrying dials.

9. A calculating machine, comprising a series of columns of keys, said columns corresponding to units, tens, hundreds etc. denominations, a number registering dial for each of said denominations adapted each to display its numbers one at-a time in line with their respective key columns, means operated by the keys of the respective columns to rotate said registering dials in line therewith, a carrying number registering dial for each of said key columns except thealnits column adapted each to display its niiriibers one at a time in line with -a column of said keys'and the numbers registered by the other dials, and means controlled by keys in imparting rotation to the carrying dials in line with a key column \of a next higher denomination.

l0. A calculating machine, comprising a series of columns of keys, said columns -corresponding to units, tens, hundreds etc. denominations, a number registering dial for each of said denominations adapted each to display its numbers one at a time in line with their respective key columns, means operated by the keys of the respective columns to rotate said registeringn dials in -line therewith independently of the others, a carrying number registering dial for each of said ke \7 columns except the units column adapted each to display its numbers one at rock shaft of a lnextv the respective columns for a time in line with a column of said keys and the numbers registered by the other dials, and means controlled by keys in the respectivevcolumns for imparting rotation to the carrying dials in line with a key column of a next higher denomination, the rotation of each of said carrying dials being independent of that of any of the other carrying dials.

11. A calculating machine, comprising a series of columns of keys, said columns corresponding to units, tens, hundreds etc. denominations, a number registering dial for each of said denominations adapted each to display its numbers one at a time in line with their respective key columns, means operated by the keys of the respective colunms to rotate said yregistering dials in line therewith, a. carrying number registering dial for each -of said key columns except the units column adapted each to display its numbers one at, a 'time in line with a column of said keys and the numbers registered by the other dials, and means controlled by keys in the respective columns for imparting rotation to the carrying dials in line with a key column of a next higher denomination, and a series of number registering dials arranged to display their numbers in line with the column of the operated key, and in linefr with the numbers displayed'by the lother 'dials corresponding to the same column, said ing angular movement 'to said rock shafts` from the keys of their respective columns, the sald movement of sald rock shafts varying accordlng to the key 1n a column operated, a number registering dial for each of said rock shafts and means for rotating said dials from their correspondmg rock shafts and independentlymf each other, a series of carrying number registering dials, a series ofcams, one for each ,of said carrying dials -and each operated by an individual rock shaft, a ratchet fast to each of said carrying dials, a pawl for each of said ratchets,

an angularly movable arm for each of said carrying dials for supporting their respective pawls, and a series of lever arms, one engaging each of said cams and operatively connected to the pawlcarrying arm of an adjacent carrying dial;

In testimony whereof I ailix my signature in presence of two witnesses.

J AMES F. MAYS.

lVitnesses LILLIAN M. Isnxon, FRANK THOMPSON. 

